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{-# LANGUAGE DeriveGeneric #-}
module Main where
import GHC.Generics hiding (C, D)
import GFunctor
-- We should be able to generate a generic representation for these types
data D a = D0 | D1 { d11 :: a, d12 :: (D a) }
deriving (Show, Generic, Generic1)
-- Example values
d0 :: D Char
d0 = D0
d1 = D1 (Just 'p') D0
d2 :: (Fractional a) => D (a,a)
d2 = D1 (3,0.14) D0
-- Generic instances
instance GFunctor D
-- Tests
main = print ( gmap (+1) (Just 2)
, gmap (+1) [0,1,2]
, gmap (+1) (0,0)
, gmap undefined d0 :: D ()
, gmap (const 'q') d1
, gmap (\(a,b) -> a + b) d2 :: D Float)
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